Commitments and Contingencies (Details) (USD $)	6 Months Ended
	Mar. 31, 2013 Milestone	Mar. 31, 2012
Commitments and Contingencies (Textual) [Abstract]
Milestones	$ 75,000
Royalty ranging, Minimum	5.00%
Royalty ranging, Maximum	8.00%
Royalties recorded to cost of product sales	1,600,000	727,000
Number of maximum milestones	10
Maximum payments for milestone	1,100,000
Number of specific licensed medical indication	5
Milestones range, Minimum	75,000
Milestones range, Maximum	125,000
Milestone and royalty payments clinical, minimum	2,000,000
Milestone and royalty payments clinical, maximum	6,000,000
Milestone and royalty payments regulatory, minimum	1,500,000
Milestone and royalty payments regulatory, maximum	15,000,000
Milestone and royalty payments commercial targets, minimum	25,000,000
Milestone and royalty payments commercial targets, maximum	60,000,000
Milestone and royalty payments, aggregate	200,000,000
Royalty payments are tiered, minimum	1,000,000,000
Accrued milestone agreement expenses	2,000,000
Liability for guarantees and indemnifications	$ 0
US 282 patent [Member]
Finite-Lived Intangible Assets [Line Items]
Patent expiration date	Aug. 01, 2026
RE 115 patent [Member]
Finite-Lived Intangible Assets [Line Items]
Patent expiration date	Jan. 01, 2016
US 484 patent [Member]
Finite-Lived Intangible Assets [Line Items]
Patent expiration date	Jul. 17, 2023